Chapter 10
The Muscular System
341
10
MUSCLE GALLERY
Table 10.5
(continued)
External
intercostal
(a)
Internal
intercostal
Foramen for inferior
vena cava
Foramen for
esophagus
Costal cartilage
Lumbar
vertebra
Central
tendon of
diaphragm
Foramen
for aorta
12th rib
Xiphoid process of sternum
Diaphragm
Quadratus
lumborum
Psoas major
(b)
Pericardium (cut)
Central tendon of diaphragm
Inferior vena cava
Esophagus
Diaphragm
(muscular part)
(c)
Pericardial sac
Aorta
Body of thoracic vertebra
Figure 10.11
Muscles of respiration.
(a)
Deep muscles of the
thorax. The external intercostals (inspiratory muscles) are shown
on the left and the internal intercostals (expiratory muscles) are
shown on the right. These two muscle layers run obliquely and
at right angles to each other.
(b)
Inferior view of the diaphragm,
the prime mover of inspiration. Notice that its muscle fibers
converge toward a central tendon, an arrangement that causes
the diaphragm to flatten and move inferiorly as it contracts.
(c)
Photograph of the diaphragm, superior view.
previous page 375 Human Anatomy and Physiology (9th ed ) 2012 read online next page 377 Human Anatomy and Physiology (9th ed ) 2012 read online Home Toggle text on/off